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Test ID:1.3.6.1.4.1.25623.1.0.892620
Category:Debian Local Security Checks
Title:Debian: Security Advisory (DLA-2620-1)
Summary:The remote host is missing an update for the Debian 'python-bleach' package(s) announced via the DLA-2620-1 advisory.
Description:Summary:
The remote host is missing an update for the Debian 'python-bleach' package(s) announced via the DLA-2620-1 advisory.

Vulnerability Insight:
It was discovered that there was a cross-site scripting (XSS) vulnerability in python-bleach, a whitelist-based HTML sanitisation library.

CVE-2021-23980

mutation XSS via allowed math or svg, p or br, and style, title, noscript, script, textarea, noframes, iframe, or xmp tags with strip_comments=False

For Debian 9 Stretch, these problems have been fixed in version 2.0-1+deb9u1.

We recommend that you upgrade your python-bleach packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references]

Affected Software/OS:
'python-bleach' package(s) on Debian 9.

Solution:
Please install the updated package(s).

CVSS Score:
6.4

CVSS Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2021-23980
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-23980
https://github.com/mozilla/bleach/security/advisories/GHSA-vv2x-vrpj-qqpq
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